US3386339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic amplifier
Assignee: Hydroacoustics Inc
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Filing: 1965-06-07
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Granted: 1968-06-04
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Roger L Selsam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20507; F15B2211/20515; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/315; F15B2211/3157; F15B2211/31576; F15B2211/32; F15B2211/329; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/42; F15B2211/421; F15B2211/423; F15B2211/424; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/665; F15B2211/6654; F15B2211/67; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/76; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |